NFPA 13R:2019 Standard for the Installation of Sprinkler Systems in Low-Rise Residential Occupancies.
1.2.1 The purpose of NFPA 13R shall be to provide a sprinkler system that aids in the detection and control of residential fires and thus provides improved protection against injury, life loss, and property damage.
1.2.2 A sprinkler system shall be designed and installed
accordance with this standard to prevent flashover (total involvement) in the room of fire origin, where sprinklered, and to improve the chance for occupants to escape or be evacuated.
1.2.3 The layout, calculation, and installation of sprinkler systems installed in accordance with this standard shall only be
performed by people knowledgeable and trained in such systems.
1.3 Retroactivity. The provisions of this standard reflect a consensus of what is necessary to provide an acceptable degree
of protection from the hazards addressed in this standard at the time the standard was issued.
1.3.1 Unless otherwise specified, the provisions of this standard shall not apply to facilities, equipment, structures, or installations that existed or were approved for construction or installation prior to the effective date of the standard. Where specified, the provisions of this standard shall be retroactive.
1.3.2 In those cases where the authority having jurisdiction
determines that the existing situation presents an unacceptable
degree of risk, the authority having jurisdiction shall be permitted to apply retroactively any portions of this standard deemed appropriate.
1.3.3 The retroactive requirements of this standard shall be permitted to be modified if their application clearly would be impractical in the judgment of the authority having jurisdiction, and only where it is clearly evident that a reasonable
degree of safety is provided.
1.4 Equivalency. Nothing in this standard is intended to prevent the use of systems, methods, or devices of equivalent or superior quality, strength, fire resistance, effectiveness, durability, and safety over those prescribed by this standard.
1.4.1 Technical documentation shall be submitted to the authority having jurisdiction to demonstrate equivalency.
1.4.2 The system, method, or device shall be approved for the
intended purpose by the authority having jurisdiction.
1.5 Units.NFPA 13R pdf download.